<template>
    <div class="xtx-numbox">
        <div class="label" v-if="label">{{label}}</div>
        <div class="numbox">
            <a @click="changeNumber(-1)" href="javascript:;">-</a>
            <input type="text" readonly :value="modelValue" />
            <a @click="changeNumber(1)" href="javascript:;">+</a>
        </div>
    </div>
</template>
<script>
import { useVModel } from "@vueuse/core";
export default {
    name: "XtxNumbox",
    props: {
        modelValue: {
            type: Number,
            default: 1,
        },
        label: {
            type: String,
        },
        min: {
            type: Number,
            default: 1,
        },
        max: {
            type: Number,
            default: 100,
        },
    },
    setup(props, { emit }) {
        // 1、绑定按钮点击事件
        // 2、
        const num = useVModel(props, "modelValue", emit);
        const changeNumber = (step) => {
            // 得到将要改变的值
            const newValue = num.value + step;
            if (newValue < props.min) return;
            if (newValue > props.max) return;
            num.value = newValue;
            emit("change", newValue);
        };
        return { changeNumber };
    },
};
</script>
<style scoped lang="less">
.xtx-numbox {
    display: flex;
    align-items: center;
    .label {
        width: 60px;
        color: #999;
        padding-left: 10px;
    }
    .numbox {
        width: 120px;
        height: 30px;
        border: 1px solid #e4e4e4;
        display: flex;
        > a {
            width: 29px;
            line-height: 28px;
            text-align: center;
            background: #f8f8f8;
            font-size: 16px;
            color: #666;
            &:first-of-type {
                border-right: 1px solid #e4e4e4;
            }
            &:last-of-type {
                border-left: 1px solid #e4e4e4;
            }
        }
        > input {
            width: 60px;
            padding: 0 5px;
            text-align: center;
            color: #666;
        }
    }
}
</style>